I began to investigate this
strange phenomenon. It was found that during the anomalous propagation
on the MW, I could perfectly receive the VE3UBL/B beacon. The
beacon operates in the 6 meter band at 50.059 MHz, and located
87 km away from my house. The beacon operates on a turnstile antenna
and has the 8 watts power. I usually hear this beacon with S1
level. But when anomalous propagation on the MW is present, I
hear this beacon with S 2- S4. I used to an ICOM IC-7410 on the
6- meter band.
I decided to check
the propagation of other radio stations on the MW band at the
time when WTVN Radio jammed the CKTB Radio. I checked frequencies
from 610 to 680 kHz where I usually received only three radio
station. It is CKTB (610- kHz), CFMJ (640- kHz) and
CFTR (680- kHz). It was found that
at the time I may receive two new radio stations. First was WEJL
Radio, Pennsylvania, which is located at 350 km away from me and
has power of 2 kW. The second one was CFCO Radio, Chatham, Ontario.
This radio station has power of 10 kW and is located 320 km from
Niagara Falls. The radio stations I received on my auto car radio
receiver. On the road to work I heard both of these radios with
varying success. However in anomalous areas where WTVN Radio jammed
the CKTB Radio, these radios were received very loud.
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Picture 7 VE3UBL/B Beacon
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Existing of the
anomalous reception of radio stations at the MW band occurs at
some conditions. Usually it happens from November to March. The
strongest anomalous propagation occurs from December to January.
Very good anomalous propagation occurs in the fog, light snowfall,
light rain. Super Moon, meteor showers, flares
on the sun- these circumstances affected the anomalous propagation
in good side.
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Usually, the anomalous
propagation exits when the air temperature is from plus 5 to minus
10 C degrees (or 41 to 14 F). When it is very cold (more than
minus 10 C (14 F) - minus 15 C (5 F) degrees) the anomalous propagation
usually is absence. The anomalous propagation usually not exits
at temperatures above plus 10 C degree (50 F). So it is finished
at warm weather- in spring and summer time.
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